A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
To enable an operator to easily perform operation for changing the posture of a jack without using any active device for changing the posture of the jack.SOLUTION: A jack device 20 includes an arm 30, a jack 40 having a cylinder 41, and a reaction force member 60 provided on the arm 30. The reaction force member 60 makes reaction force moment (Ms) act on all positions of the cylinder 41 from the upright posture to a stored posture. The reaction force member 60 is configured such that the reaction force moment (Ms) is larger than the self-weight moment (Mj) when the cylinder 41 is in the stored posture and the self-weight moment (Mj) is larger than the reaction force moment (Ms) when the cylinder 41 is in the upright posture.SELECTED DRAWING: Figure 2
【課題】ジャッキの姿勢を変化させるための能動的装置を用いなくても、ジャッキの姿勢を変化させる作業を作業者に容易に行わせる。【解決手段】ジャッキ装置２０は、アーム３０と、シリンダ４１を有するジャッキ４０と、アーム３０に設けられる反力部材６０と、を備える。反力部材６０は、反力モーメント（Ｍｓ）を、直立姿勢から格納姿勢までの全姿勢にわたってシリンダ４１に作用させる。反力部材６０は、シリンダ４１が格納姿勢のときに反力モーメント（Ｍｓ）が自重モーメント（Ｍｊ）よりも大きく、かつ、シリンダ４１が直立姿勢のときに自重モーメント（Ｍｊ）が反力モーメント（Ｍｓ）よりも大きくなるように構成される。【選択図】図２
To enable an operator to easily perform operation for changing the posture of a jack without using any active device for changing the posture of the jack.SOLUTION: A jack device 20 includes an arm 30, a jack 40 having a cylinder 41, and a reaction force member 60 provided on the arm 30. The reaction force member 60 makes reaction force moment (Ms) act on all positions of the cylinder 41 from the upright posture to a stored posture. The reaction force member 60 is configured such that the reaction force moment (Ms) is larger than the self-weight moment (Mj) when the cylinder 41 is in the stored posture and the self-weight moment (Mj) is larger than the reaction force moment (Ms) when the cylinder 41 is in the upright posture.SELECTED DRAWING: Figure 2
【課題】ジャッキの姿勢を変化させるための能動的装置を用いなくても、ジャッキの姿勢を変化させる作業を作業者に容易に行わせる。【解決手段】ジャッキ装置２０は、アーム３０と、シリンダ４１を有するジャッキ４０と、アーム３０に設けられる反力部材６０と、を備える。反力部材６０は、反力モーメント（Ｍｓ）を、直立姿勢から格納姿勢までの全姿勢にわたってシリンダ４１に作用させる。反力部材６０は、シリンダ４１が格納姿勢のときに反力モーメント（Ｍｓ）が自重モーメント（Ｍｊ）よりも大きく、かつ、シリンダ４１が直立姿勢のときに自重モーメント（Ｍｊ）が反力モーメント（Ｍｓ）よりも大きくなるように構成される。【選択図】図２
JACK DEVICE
ジャッキ装置
ARITA RYUICHI (author)
2022-04-11
Patent
Electronic Resource
Japanese